get_one_media: don’t try to decode utf8 on filenames on windows
get_one_media: don’t try to decode utf8 on filenames on windows

more fixes #233
qnorsten/svtplay-dl,leakim/svtplay-dl,OakNinja/svtplay-dl,qnorsten/svtplay-dl,dalgr/svtplay-dl,selepo/svtplay-dl,iwconfig/svtplay-dl,dalgr/svtplay-dl,olof/svtplay-dl,OakNinja/svtplay-dl,spaam/svtplay-dl,spaam/svtplay-dl,leakim/svtplay-dl,leakim/svtplay-dl,iwconfig/svtplay-dl,selepo/svtplay-dl,OakNinja/svtplay-dl,olof/svtplay-dl